They were startled, and a little unsure what to do -- after all, the ceremony was in four hours, and you can't just print up a new star at the local CopyMart. I snapped a pic with my BlackBerry, then hustled to work and called Ana Martinez-Holler, the press rep for the Hollywood Walk of Fame. "Are you sure?" she gasped, and then, understandably, she hurried off the phone.

The actress reportedly was in good spirits about the mistake -- and yada, yada, yada -- by ceremony time, the star was temporarily fixed (see: above photo).

Dreyfus is the first "Seinfeld" cast member to receive the honor.

Cast Aside: Actors Who Almost Had the Part

"Seinfeld" co-creator Larry David and Alan Horn, president and chief operating officer of Warner Bros., joined Louis-Dreyfus in speaking in the late-morning ceremony in front of the W Hotel.

Louis-Dreyfus said she enjoyed having a career in comedy, which allowed her to "make jokes about how in high school I was voted "Girl Most Likely to Wind Up on Hollywood and Vine."

"Of course, they never thought I'd be getting something, they thought I'd be giving something," she quipped. "See, I can make jokes like that."

The star unveiling came eight days before the fifth season finale of Louis-Dreyfus' CBS comedy "The New Adventures of Old Christine."